Binaries of vim 5.7 compiled on Macintosh are available here.
Because vim handles multibyte characters, it is possible to use
Japanese on Macintosh vim 5.7.
(I think Korean and Chinese are also OK, but I have not tested them.)

Important Notice:
The previous binaries found in this page (the ones compiled on June
27, 2000 or before) are found to have a crashing bug when editing a
large file (several megabytes or more than 32k lines).
This bug was fixed by the patch 5.7.009.
If you are using one of the old binaries, it is strongly recommended
to use the following new binaries.

Download one of the following binaries and expand it to the same
folder as the runtime folder is.
(The compilation was done on August 9, 2000.
Sit archives require a later version of StuffItExpander that can
decode StuffIt5 format.)